Belt-tension-regulating mechanism.



T B. M. w. HANSON. BELT TENSION REGULATING MECHANISM.

APPLICATION FILED JUNE 2, 1908.

Patented Dec. '1, 1908.

. FII H r r \w m .F v no mm lilii M5 zm w Wanesses:

"ij'fi vjilTE-D sirerrnsfrn'rnnr OFFICE.

e WHITNEY;

W. HANSON, OF HARTFORD, (EONNE(.YIIOUT, ASSIGNOR TO l?RATT & COlVlPANY, .OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY. p 1-? l 1 l I nnnr rnnsion QGULATIN MECHANISM.

130:. 905,525. i fipecificaizion of Letters Paftent. Patented Dec. 1; 1908 Application filed June 2.190s Serial No. 436,201.

.To all whom it may coi'icem." Like characters refertolike parts throng? Be it known that l, N. HAN on? the several figures of the drawings. W so J. :1.(J1llZi?D oi i'he Luiued felt; cs, residing 'lTheQiu'ticula-r character of rnachine'shoivn i at inirtilord. in ilic eoun i ,l-iurliiord and in purl. in the drawings is one for grinding 5 Shire of i'jonnecliciu, huve in mnlcd certain metal and such a machine lncludes in its new i iuiroveiuei'i'ts in Belt-Tour moire up a base or l)(l as 2. Upon this lied ionl .l'i clinu' u, of which the is mounted platen as 3 which is ordinzir'ilv q )llUWll'lg is a. specification. i'i'iounted for swinging movement about a "'ll'iis invenlion rehiics'to helli-lxeur'aion-reguvertical axis; it is shown as having a pivotal 1O lining niecluinisni, the object of the iuven connection l with the base or bed 2.

tion being to provide eliective niech anisiu of platen is mounted to swin so that thenngle ihe character set forth which is in ceptihle offs tool curried thereby can be varied with of advantageous use ina vurieliy of ways and respect lo thework. .W'hile the tool and its by which the tension of, e belt cen'he easily adjuncts, by which I mean its spindles-nil 15., and precisely regulated. I operating pulley are supported by (the platn';i2 i in lhc drawings accompanying and fern they are not'in the present case directlycar- 7 in}; part oi: this specification l. have shown rieol thereby but by a ll&fl5l0(3l as 5 which in deinil inc simple form of embodiment of has n sliding movement on and longitudililo invruiiou which to enable those Sliil nullyoi": the platen 3, the head-stock being $50 in ihe an; to pr; clice the some will be set held in an adjusted position by :i clzirnpinga forth in detail in the following description device such as that denoted in a. general way 7 5 while the novelly of the invention will he by i included in the claims" succeeding said de- The head-stock is shown as having a 1:. ion. in said form of embodiment of" curved, overhanging arm as. 7 terminating the invcnlion l have shown clue letter in in nhuhwhich rotat-ively receives a Workcoinl'iinatiou with or us part oil. a metal spindle as 8 to whichiis fastened in some working; machine having a swinging platen suitable manner a wide-faced pulley as 9 sup 'iorting n pulley or equivalent driven which with its spindle purta kes of the swingwheel opcruliilc from {1. belt extending from ing; movement of. the platen 8. The pullcy $0 or drum sustained by u purl supported in- 9 may be drivenloy a belt as 10- passed over dcpcmlenily ofthe plelen. As ihe platen is a drum (not shown) but which is generally swung during the opcrnlion of said machine placed overhead and is carried in fixed the relation between lhc pulley (hereon and bearings or hangers. hen the p uten is the drum chum so thnl ordinarily the icnswung relatively to lliis drum the axis of 35 sion oi? the hell. is so ul'l'cclied us to cause im the pulley 5) at one time will be in one relapi'oper :u-lion of the pulley, To secure u i lion with the drum while at other times the }MUi'ul ooi'ili'ol oi. the hell. mount on the l relation will be different and were'it not for plul'cu u l'cusi(in-regulator 'l'iicli is nuinui'lic hell-tension re 'ulutor the tension of the ully-v pcruldc and which prior loan adjust suid hell; might be at one period too-great 40 iu'cut' oi the platen will he manipulated to l and at another it might be too small, the

' permit, 'lrceJ-uviuging of the platen and when Ioluliou oi the ind-{liming naturally affected.

l provide :1 tension aregulutofi which luincd the icnsionreguluior will he adjusted swings wilhthc pinion and which can be to secure the prcc'sc tension in the hell to inousily operated to obtain 'the exact tension l l l l l l 1 l [he miplslinenl. of the lalitcr has been oh la sure the host p his driving ell'ecl. in llll hell: such regulator by virtue of its icilcrring lo said drmviugs Figure l is 2 location li ing readily accessible. 1 willv fron clcvulioi'i oi the head slocl; of u. inetulnow (l(S lllH! the form of tension-regulator working: machine equipped Willi icnsiom shown. fluid regulator is dcsignuted. in a rcg ululiug inc-ans involving my invention. 'c'cncrul way by 11 and includes in its con- 50 Fig. on end clevz-uiou of lhe sun 2, 21 st l'lllJllUl'l an arm us 12 at the opposiie ends suppm'iihg' plulcu for the head stock, and 2t Oli'WVlllCll urn i'otutively inoiu ied pulleys as bed, the luiicrhoing in section. Fig. 3 is :1. 13 and 14 and against which is'placcd. one sectional detail. licreinzilj'lcr more urlicu; of (he runs of the belt 10. The arm 12is larly (ll-scribed. preferably mounted for swinging movement upon an axis between its ends for which purpose it may be provided with a pivot as 15 extending through a split hub or collar as 16 on the horn or projection 17 extending from the arm 7. The stub-shafts for the pulleys 13 and 14 extend from one side of the arm 12 and the pivot or stud 15 extends from the opposite side of said arm 12. It might be stated that what is shown as the run of the belt 10 'on the right in Fig. 2 is shown as placed against the outer side of the upper pulley 13 and the inner side of the lower pulley 14. Should the tension of the belt 10 therefore be not as required the difiiculty can be easily and quickly remedied by rocking the arm 12. It will be clear that the arm 12 does not normally oscillate or rock but is only swung when an adjustment of the belt is to be obtained after which the arm 12 is firmly held in the adjusted relation and the means shown ior obtaining this function will now be set orth.

The split hub 16 has upstanding ears or lugs as 18 perforated to receive a screw as 19 the head of which bears against one of said lugs while a nut as 20' threaded onto said screw bears against the other lug when the clamping means for the pivot or stud 15 is in operative relation. The nut 20 has a handle 21 by which it may be easily operated.- By turning the nut 20 to the left the clamping pressure of the split hub 16 on the pivot or stud 15 can be relieved so that the arm 12 can be adjusted after which the nut will be set up to maintain the adjustment;

In some cases it is not necessary to operate the tension-regulator 11 prior to-the swing of the platen 3. If for example the operator of the machine knows that the swing of the platen will result in loosening the belt 10 it is not necessary for him to touch the has been adjusted at which time the tensionregulator; will bemanipulated to take the tension-regulator 11 until after the platen 3 slack out of the belt. If on the contrary he knows that the shiftin of the platen,would tend to tighten the be t it will be necessary to loosen up the tension-regulator and after the adjustment of the platen is secured, said regulator will be manipulated to take out the slack in the, belt. As the regulator swings to eliminal belt-slack the upper ulley 13 moves outward while the lower pu ley '14 moves inward and the arm 12 may be grasped by the operator to accomplish such result W'hat I claim is:

1. A belt tightening device comprising an arm, a laterally extending pin on one side of the arm, constituting a pivot therefor, a

pair of pulleys supported bythearm. at the V opposite side thereof and also located at opposite sides of said-pivot, a split bearing yfor receiving said pin, and means for drawing the beanng around the pin to clamp the same and thereby hold the arm in an adv i j usted position.

2. The combination of a'pulley, an arm having a laterally-extending pin on one side thereof, a pair of pulleys at the "opposite side of said arm, a split hub in whichsaid pin turns as a pivot, the pulle s being located at opposite sides of the axle of mo-,

tion of said arm and being cooperative with said first mentioned pulley, and. means for drawing the hub into clamping relation with I said pm.

In testimony whereof I aflix my signature in presence of two witnesses. I

' BENGT M. W. HANSON. Witnesses:

W. M. Sronas,

H. W. KILBO RNE. 

